Travel corporation Sabre Holdings is in its third year of hosting a global volunteer week. It offers a public blog for its 9,000 employees around the world to share their volunteer experiences.

"We find the stories very moving and real with photos to emphasize the reality of their impact," says Carrie Mamantov, Social Responsibility Program Architect at Sabre. "We even do a contest of sorts for employees to vote on their favorite entry and then give that office some donation money to give back to the charity they helped."